Why stainless steel corrosion resistance

- Jul 19, 2017 -

All metals react with oxygen in the atmosphere, forming an oxide film on the surface. Unfortunately, the formation of iron oxides on ordinary carbon steel continues to oxidize, causing corrosion to continue to expand, eventually forming holes. You can use paint or oxidation-resistant metals (e.g., zinc, nickel, and chromium) to insure the surface of the carbon steel, but, as people know, this protection is only a thin film. If the protective layer is damaged, the steel below begins to rust.

The corrosion resistance of stainless steel depends on chromium, but because chromium is one of the components of steel, the protection methods are different.

When the amount of chromium added to more than 11.7%, the atmospheric corrosion resistance of steel increased significantly, but the chromium content is higher, although the corrosion resistance can still be improved, but not obvious. The reason is that when the steel is alloyed with chromium, the type of surface oxide is changed into a surface oxide similar to that formed on the pure chromium metal. This tightly bonded rich chromium oxide protects the surface and prevents further oxidation. This oxide layer is extremely thin, through which it can see the natural luster of the steel surface, so that stainless steel has a unique surface. Moreover, if the surface is damaged, the exposed surface of the steel will be repaired with the atmospheric reaction, and the oxide "passivation film" can be formed again, and the protective effect will continue.


Previous: Main application fields of stainless steel wire rope in China Next: Maintenance method of stainless steel wire rope

Related Industry Knowledge

Related Products

  • 1x12 Steel Wire Ropes,304,316,316L, 1.0mm Steel Wire Cables,brake Wire Ropes,rigging Wire Ropes
  • 7x19 Steel Wire Ropes,304,316,316L, 2.0mm Steel Wire Cables,rings Wire Ropes,hanging Wire Ropes
  • 1x19 Galvanized Steel Wire Ropes,304,316,316L, 0.6mm Steel Wire Cables,brake Wire Ropes
  • 7x7 Galvanized Steel Wire Ropes,304,316,316L, 0.8mm Steel Wire Cables,conveyor Wire Ropes,fishing Wire Ropes
  • 1x12 Coated Steel Wire Ropes,plastic,PVC,nylon,rubber Cables,rigging Wire Ropes,hanging Wire Ropes
  • 8x7+1x19 Coated Steel Wire Ropes, Plastic,PVC,nylon,rubber Cables,machines Wire Ropes,fishing Net Wire Ropes